Hue is especially important in the area of cartography where it is often used to distinguish between different elements on a map. Certain conventions exist for the use of some hues in cartographic design, such as blue for water or green for vegetation; such conventions have been used for many centuries. Hue is especially useful in displaying nominal, or qualitative data, where different hues represent different, unrelated phenomena. Hue is especially useful in displaying nominal, or qualitative data, where different hues represent different, unrelated phenomena. For example, a point layer representing cities in the United States could be divided into two groups: green points representing the capital cities and blue points representing all other cities. The two types of data are on the same map, but do not have the same meaning. In this case it makes sense to use two different hues (blue and green) to differentiate the nominal data. Whereas, when working with quantitative data, hue is best used in combination with value or saturation.
Active vs. passive colors
Active colors are brighter colors of hue such as red, yellow and orange. They tend to described as warm and give feelings of confidence and enthusiasm.
Passive colors are the more neutral hue colors such as blue, purple, and green. The feelings generally associated with passive colors are calming and focusing.
- Color Basics
- Nikolova, M., Steidl, G., Fast Hue and Range Preserving Histogram Specification: Theory and Algorithms for Color Image Enhancement, Image Processing, IEEE Transactions on, 2014, 23, 9 4087-4100
- Robinson, Arthur H., Morrison, Joel L., Muehrcke, Phillip C., Kimberling, A. Jon, Guptill, Stephen C. (1995). Elements of Cartography (6th ed.). John Wiley & Sons, Inc. ISBN 0-471-55579-7